The principle of infrared bar code

Infrared identification of bar code should be simple. is the physical knowledge, the lens of candle imaging technique, Add to this a light spot sensor conversion. It is for this reason that position of the lens, and the size of the sensor, the density of the relationship, So here used a scanning distance and density parameters to distinguish the performance of the machine. After the bar code imaging, the sensor to give bar code some translation work. and return to the translation code(converted into digital code 0 or 1) from the QR codes in their black and white form,